Self Driling Screw-Black Tianjin Ruiya Internation St Co., Ltd. Base Info Model NO.：SWSMaterial：Carbon SteelType：Hexagon HeadHead Style：RoundConnection：Common BoltGrade：12.9Trademark：E-starOrigin：China Mainland Description Pre：Trox Conrete Screws Next：DIN7504 Self-Drilling Screw
